Tool for truing abrading-wheels.



PATEI TTED NOV. 24, 1903.

L. A. SHERMAN.

' TOOL FOR- TRUING ABRADING WHEELS.

APPLICATION FILED JULY 5, 1902.

N0 MODEL.

IN VENT O R 7cm 3 I Altorneys.

WITNESSES m: Nomus PEYEIS co. mmaumo. wnsmucwn. n.

UNITED STATES Patented November 24, 1903.

ATENT QFFIC TOOL FOR TRUING ABRADlNG-WHEELS.

SPECIFIGATIGN forming part of Letters Patent No. 745,120, dated November24, 1903. Application filed July 5, 1902. Serial No- 114,372. (Nomodel.)

To all whom it may concern.-

Be it known that I, LOUIS A. SHERMAN, a citizen of the United States,residing at Detroit, county of Wayne, State of Michigan, have invented acertain new and useful Improvement in Tools for Truing Abrading- Wheels;and I declare the following to be a full, clear, and exact descriptionof theinvention, such as will enable others skilled in the art to whichit pertains to make and use the.

same, reference being had to the accompanying drawings, which form apart of this specification.

This invention relates to tools for truingand dressing grinding orabrading wheels; and it has for its object asimple, practical, andefficient tool made from pressed and hardened disks of steel arranged todo the desired Work.

The tool in which this invention is embodied retainsits cuttingproperties or properties of dressing the hard material of theabradingwheel for a long period of time until it is worn to the hub. Itis made from disks of steel that are radially corrugated, and theperiphery of the corrugated disk is notched at irregular intervals.Several disks of corrugated steel havingdiiferent schemes of corrugationare placed side by side on a spindle or a bushing that runs on aspindle, and the spindle is held in a handle by which the tool ismanipulated.

In the drawings, Figure 1 is a section longitudinal of the handle andlongitudinal of the spindle. Fig. 2 is a side elevation of anabrading-disk. Fig. 3 is asection longitudinal of the handle, showing aside elevation of a corrugated disk. Fig. 4. is an edge View of acorrugated disk. Fig. 5 is a perspective of a small portion of aidisk.Fig. 6 is an end View of the tool, showing the different schemes ofcorrugation of the two disks.

1 indicates a forked handle in which there is a spindle 2. On thespindle 2 is mounted a bushing 3, that is arranged to rotate on thespindle. At one end of the bushing 3 is a collar 4, which serves as anabutment against which to hold the disk, hereinafter mentioned. On thebushing are several, at least three, corrugated disks 5 6 7. These disksare originally fiat plates of uniform thickness, circular, and providedwith a circular central aperture 8. The flat disks are corrugated withradial corrugations that vanish in the fiat surface of the plate a shortdistance from the line which bounds the opening 8 and are bent toproduce a waved outline on the periphery. The periphery is notched withnotches 10, that are irregularly spaced around the entire periphery. Thedisks are made with difierent schemes of cor- 'rugations-as, forexample, in Fig. 2 there are shown fourteen corrugations and in Fig. 3twelve corrugations--andin assembling the disks on the bushing they areassembled in a Way so that they will not nestas,for example, the disk ofFig. 2 and the disk of Fig. 3

' would be placed contiguous, the disk of Fig. 2 being placed betweentwo disks of the Fig. 3 scheme, so that when the collar 4 is placed onthe bushing and brought to a position to force the disks togethertheybear with the raised portions of the corrugations in contact and areprevented from nesting closely together, but are nevertheless held quitefirmly, and the turn on its spindle.

Provision is made for admitting oil between the bushing and the spindlethrough oil-holes 2. The handle is provided with a rest 1.

In operation the abrading-stone which is to be dressed is set in motion,and the notched and corrugated edges of the disk are held against thatportion of the stone which is to be dressed. A rapid rotation is givento the disks as soon as they come in con-tact with the moving stone, andshort irregular blows are struck on the stoneby the teeth of the tool,dressing it rapidly and easily.

What I claim is.-

1. In a tool for dressing abrading-wheels, in combination with a handle,a spindle carried thereby a bushing mounted on said spindle, apluralityof radially-corrugated metal disks arranged with different'schemes ofcorrugation, whereby they are prevented from nesting mounted and rotatedon said bushing, substantially as described.

bushing is allowed to V 2. In a tool for dressing abradingwheels, Intestimony whereof I sign this specificw the combination of a spindle,disks threaded tion in the presence of two Witnesses. upon said spindlecontiguous to each other,

said disks being stamped out of sheet metal LOUIS SHERMAN 5 withdiiferent schemes of corrugation Where- Witnesses:

by they are prevented from nesting, substan- CHARLES F. BURTON,

tially as described. CHARLES E. WISNER.

